<template>
  <view>
    <view class="goods-item">
      <!-- 左侧图片区域 -->
      <view class="goods-item-left">
        <radio :checked="goods.goods_state" color="#c00000" v-if="showRadio" @click="radioChangeHandler"/>
        <image class="goods-pic" :src="goods.goods_small_logo || defaultPic"></image>
      </view>
      <!-- 商品右侧信息区域 -->
      <view class="goods-item-right">
        <!-- 商品标题 -->
        <view class="goods-name">
          {{ goods.goods_name }}
        </view>
    
        <view class="goods-info-box">
          <!-- 商品价格 -->
          <view class="goods-price">
            <!-- ¥{{ goods.goods_price | tofixed }} -->
            ¥{{ Number(goods.goods_price).toFixed(2) }}
          </view>
          <uni-number-box class="num-box" :min="1" :value="goods.goods_count" @change="numChangeHandler" v-if="showNum"></uni-number-box>
        </view>
      </view>
    </view>
  </view>
</template>

<script>
  export default {
    name:"my-goods",
    props: {
      goods: {
        type: Object,
        default: () => ({})
      },
      showRadio: { // 是否显示radio
        type: Boolean,
        default: false
      },
      showNum: {
        type: Boolean,
        default: false
      }
    },
    data() {
      return {
        // 默认的空图片
        defaultPic: 'https://img3.doubanio.com/f/movie/8dd0c794499fe925ae2ae89ee30cd225750457b4/pics/movie/celebrity-default-medium.png',
      };
    },
    filters: {
      tofixed(num) {
        return Number(num).toFixed(2)
      }
    },
    methods: {
      // radio 组件的点击事件处理函数
      radioChangeHandler() {
        // 通过 this.$emit() 触发外界通过 @ 绑定的 radio-change 事件，
        // 同时把商品的 Id 和 勾选状态 作为参数传递给 radio-change 事件处理函数
        this.$emit('radio-change', { 
          goods_id: this.goods.goods_id ,
          goods_state: !this.goods.goods_state // 商品最新的勾选状态
        })
      },
      // NumberBox 组件的 change 事件处理函数
      numChangeHandler(value) {
        // 通过 this.$emit() 触发外界通过 @ 绑定的 num-change 事件
        this.$emit('num-change', {
          goods_count: + value, // 商品的最新数量
          goods_id: this.goods.goods_id
        })
      }
    }
  }
</script>

<style lang="scss" scoped>
  .goods-item {
    display: flex;
    padding: 10px 5px;
    border-bottom: 1px solid #F0F0F0;
    .goods-item-left {
      margin-right: 5px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      // radio {
      //   width: 5px;
      // }
      .goods-pic {
        width: 100px;
        height: 100px;
        display: block; // 去掉圖片底邊留白
        // vertical-align: middle
        // https://segmentfault.com/q/1010000000694663
      }
      radio {
        transform: scale(0.9)
      }
    }
  
    .goods-item-right {
      display: flex;
      flex: 1;
      flex-direction: column;
      justify-content: space-between;
      .goods-name {
        font-size: 13px;
      }
      .goods-info-box {
        display: flex;
        justify-content: space-between;
        align-items: center;
        .goods-price {
          font-size: 16px;
          color: #c00000;
        }
      }
    }
  }
 
</style>
